CN111381426B

CN111381426B - Light source system and projection equipment

Info

Publication number: CN111381426B
Application number: CN201811642779.1A
Authority: CN
Inventors: 胡飞; 孙微; 郭祖强; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2021-12-31
Anticipated expiration: 2038-12-29
Also published as: WO2020135302A1; CN111381426A

Abstract

The invention provides a light source system and a projection device, wherein the light source system comprises: a first light source for emitting excitation light; a second light source for emitting laser as supplement light; the wavelength conversion element comprises a conversion region, wherein the conversion region is used for performing wavelength conversion on exciting light emitted by the first light source to obtain excited light; the laser light emitted by the wavelength conversion element and the supplementary light emitted by the second light source are arranged side by side at the entrance of the light uniformizing device. In the light source system provided by the invention, the received laser light emitted by the wavelength conversion element and the supplementary light emitted by the second light source are arranged side by side at the entrance of the light uniformizing device, so that the loss of the received laser light can be reduced and the light effect can be improved when the received laser light and the supplementary light are combined.

Description

Light source system and projection equipment

Technical Field

The invention relates to the technical field of projection, in particular to a light source system and projection equipment.

Background

This section is intended to provide a background or context to the specific embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

In a single-chip DMD projection system, a primary light is generally generated by using the method shown in fig. 1A and fig. 1B, as shown in fig. 1A, a first light source 10 emits a blue laser, which passes through a regional diaphragm 20 to excite a wavelength conversion element 50 to generate sequential red, green, and blue lights, so as to form three primary lights required by the projection system, wherein the blue laser is used as a blue primary light after partial coherence is eliminated by scattering powder on the wavelength conversion element 50, the blue laser excites green phosphor on the wavelength conversion element 50 to obtain a green primary light, and simultaneously, the blue laser excites orange phosphor or yellow phosphor on the wavelength conversion element 50 and then obtains a red primary light by a filter. The fluorescence and the laser light emitted after being reflected by the wavelength conversion element 50 are lost when passing through the area diaphragm 20.

As shown in fig. 1B, the light source system includes a supplementary light source 11 having a different wavelength from the first light source 10, and the loss of the fluorescence on the area film 20 is relatively reduced due to the reduced ratio of the fluorescence, but the loss of the laser light and the fluorescence on the area film 20 is generated, and the loss of the laser light and the fluorescence on the area film 20 also causes a problem of color uniformity.

Disclosure of Invention

In view of the above, one aspect of the present invention provides a light source system, including:

a first light source for emitting excitation light;

a second light source for emitting laser as supplement light;

the wavelength conversion element comprises a conversion region, wherein the conversion region is used for performing wavelength conversion on exciting light emitted by the first light source to obtain excited light; the laser light emitted by the wavelength conversion element and the supplementary light emitted by the second light source are arranged side by side at the entrance of the light uniformizing device.

A second aspect of the invention provides a projection device comprising a light source system as described above.

In the light source system provided by the invention, the received laser emitted by the wavelength conversion element and the supplementary light emitted by the second light source are arranged side by side at the entrance of the light uniformizing device, so that the loss of the received laser can be reduced and the light effect can be improved when the received laser and the supplementary light are combined.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments/modes of the present invention, the drawings needed to be used in the description of the embodiments/modes are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments/modes of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1A is a schematic structural diagram of a conventional projection apparatus.

Fig. 1B is a schematic structural diagram of a conventional projection apparatus.

Fig. 2 is a schematic structural diagram of a light source system according to a first embodiment of the present invention.

Fig. 3 is a schematic structural diagram of the wavelength conversion element shown in fig. 2.

Fig. 4 is a schematic view of the position of a light spot at the entrance of the light unifying apparatus shown in fig. 2.

Fig. 5 is a schematic structural diagram of a light source system according to a second embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a light source system according to a third embodiment of the present invention.

Fig. 7 is a schematic structural view of the wavelength conversion element shown in fig. 6.

Fig. 8 is a schematic structural diagram of a light source system according to a fourth embodiment of the present invention.

Fig. 9 is a schematic structural view of the wavelength conversion element shown in fig. 8.

Fig. 10 is a schematic structural diagram of a light source system according to a fifth embodiment of the present invention.

Fig. 11 is a schematic structural view of the wavelength conversion element shown in fig. 10.

Description of the main elements

Light source system

100, 200, 300, 400, 500

First light source

10, 110, 310, 410, 510

Luminous body 111

Lens 112

Dodging device 113

Second light source

120, 220, 320, 420

First light emitter 121

Second light emitter 122

Third light emitter 123, 323

First

light combination element

130, 330, 430, 530

Wavelength conversion element

50, 150, 350, 450, 550

Drive unit 151

Transition regions

152, 352, 452, 552

First section O1

Second section G1

Scattering element D

Scattering region B1

Substrate 154

The

filter elements

156, 356, 456, 556

Light evening device

180, 280, 380, 480, 580

Inlets

181, 281, 381, 481, 581

First region p

Second region q

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a detailed description of the present invention will be given below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The invention provides a laser fluorescence light source system and projection equipment, which realize the light combination of laser and fluorescence by using a new light combination mode, wherein the emitted laser of the light source system is fluorescence, the emitted supplement light is laser, and the emitted laser of the light source system and the supplement light are arranged side by side in space, so that the loss generated in the light combination process of the emitted laser and the supplement light in the light source system is reduced, and the light effect is improved; on the other hand, the area of a light spot formed by the laser at the entrance of the dodging device is smaller than the area of the supplement light at the entrance of the dodging device, so that the fluorescent dosage can be reduced, the laser dosage is increased, and the color gamut is effectively expanded. The projection apparatus further includes a light modulation Device, such as a DMD (Digital Micro-mirror Device), an LCD (Liquid Crystal Display), or an LCOS (Liquid Crystal On Silicon), for modulating the light emitted from the light source system.

The first embodiment is as follows:

referring to fig. 2-4, fig. 2 is a schematic structural diagram of a light source system 100 according to a first embodiment of the present invention, fig. 3 is a schematic structural diagram of a wavelength conversion element 150 and a scattering element D shown in fig. 2, and fig. 4 is a schematic diagram of a light spot at an inlet 181 of a light uniformizing device 180 shown in fig. 2.

The light source system 100 includes a first light source 110, a second light source 120, a wavelength conversion element 150, a scattering element D, and a light uniformizing device 180. The first light source 110 is configured to emit excitation light, and the second light source 120 is configured to emit laser light as supplementary light; the wavelength conversion element 150 includes a conversion region 152, and the conversion region 152 is used for performing wavelength conversion on the excitation light emitted by the first light source 110 to obtain excited light; the scattering element D is configured to receive the complementary light emitted by the second light source 120 and scatter the complementary light, and the scattering element D and the wavelength conversion element 150 are spatially arranged side by side, so that the excited light emitted by the wavelength conversion element 150 and the complementary light emitted by the scattering element D are spatially arranged side by side; the light emitted from the wavelength conversion element 150 and the scattering element D passes through the dodging device 180 and then exits from the light source system 100.

In the present embodiment, the scattering element D is disposed outside the wavelength converting element 150. Of course, in other embodiments, the scattering element D may also be disposed inside the wavelength converting element 150. In addition, the scattering element D may be disposed beside the wavelength conversion element 150 as shown in fig. 2, or may be disposed at another position of the light emitting path of the complementary light, as long as the light spots when the received light emitted from the wavelength conversion element 150 and the complementary light emitted from the scattering element D are combined at the dodging device are ensured to be arranged side by side.

Specifically, the first light source 110 may be a blue light source for emitting blue excitation light. The first light source 110 includes a light emitter 111, a lens 112 and a light uniformizing device 113. The light emitter 111 may include a blue laser or a blue light emitting diode, and the number of the lasers or the light emitting diodes in the light emitter 111 may be selected according to needs. In one embodiment, the first light source 110 may also be an ultraviolet light source or other color light source. Further, the lens 112 is configured to collimate the excitation light emitted from the light emitter 111, the collimated excitation light is homogenized by the light homogenizing device 113 and then emitted, and the light homogenizing device 113 may be an optical integrator rod or a fly eye lens. It will be appreciated that in some embodiments, particularly in miniaturized light source systems, the light unifying device 113 may be omitted.

The second light source 120 is configured to emit laser light as supplementary light, and the supplementary light includes laser light of multiple colors. Further, the second light source 120 includes a first light emitter 121, a second light emitter 122, and a third light emitter 123, wherein the first light emitter 121 is configured to emit first color laser light, the second light emitter 122 is configured to emit second color laser light, and the third light emitter 123 is configured to emit third color laser light. In this embodiment, the first color is red, the second color is green, and the third color is blue, but the first color, the second color, and the third color are not limited to the above colors. The second light source 120 further includes necessary lenses and light homogenizing devices to collimate and homogenize the supplemental light.

As shown in fig. 2 and 3, the wavelength conversion element 150 includes a conversion region 152, and the conversion region 152 is provided with a wavelength conversion material for generating a stimulated light of another color under excitation of blue excitation light, in the present embodiment, the wavelength conversion material is a phosphor, the stimulated light is fluorescence, and the stimulated light includes a first color fluorescence (red fluorescence) and a second color fluorescence (green fluorescence). As shown in fig. 3, the converting region 152 includes a first section O1 and a second section G1, wherein the first section O1 is provided with an orange phosphor, and the second section G1 is provided with a green phosphor. The first section O1 and the second section G1 in the conversion region 152 are located on the light path of the excitation light, and the conversion region 152 emits orange fluorescence and green fluorescence at a time sequence, where the orange fluorescence is a mixed light of red fluorescence and green fluorescence.

It is understood that in other embodiments, a yellow phosphor may be used instead of an orange phosphor, or a red phosphor may be used instead of an orange phosphor. In one embodiment, the plurality of sub-areas of the transition area 152 are provided with yellow/or orange phosphor, red phosphor, and green phosphor, respectively.

The light source system 100 is further provided with a driving unit 151 and a substrate 154, wherein the substrate 154 is used for carrying the wavelength conversion element 150, and the substrate 154 may be made of a metal material or a transparent material. The driving unit 151 is disposed at the bottom of the substrate 154 and is used for driving the substrate 154 to move periodically. In the present embodiment, the wavelength conversion element 150 has a ring shape, the substrate 154 has a circular shape, and the wavelength conversion element 150 is provided on the surface of the substrate 154.

The scattering element D is a scattering layer or a scattering sheet coated on the surface of the substrate 154, and is used for transmitting and scattering the supplementary light to eliminate the coherence of the supplementary light, thereby alleviating the speckle effect generated by the supplementary light. The scattering element D is annular and disposed on the substrate 154, and further, the wavelength conversion element 150 and the scattering element D are disposed on the same surface of the substrate 154 and arranged side by side.

In this embodiment, the excitation light emitted from the first light source 110 is guided by the first light combining element 130 and then incident on the conversion region 152 of the wavelength conversion element 150, and the complementary light emitted from the second light source 120 is guided by the first light combining element 130 and then incident on the scattering element D.

As shown in fig. 2, the excitation light emitted from the first light source 110 and the complementary light emitted from the second light source are guided by the first light combining element 130 and then respectively incident on the conversion region 152 and the surface of the scattering element D. Since the excitation light and the complementary light are respectively irradiated onto different optical elements on the substrate 154, the optical axes of the excitation light and the complementary light incident on the surface of the first light combining element 130 are not coincident. For example, the excitation light is incident on a first portion of the first light combining element 130, the complementary light is incident on a second portion of the first light combining element 130, the first portion and the second portion may be adjacent to each other or spaced apart from each other, and the first portion and the second portion do not overlap with each other, as shown in fig. 2, the first portion is an upper half portion of the first light combining element 130, and the second portion is a lower half portion of the first light combining element 130. The first part of the first light combining element 130 is used for transmitting the excitation light or disposing an antireflection film, the second part is used for reflecting the red, green and blue laser light in the supplement light, and a reflective film may be disposed. Because the divergence angles of the excitation light and the supplement light are both laser light and are small, the areas of the first part and the second part of the first light combining element 130 are respectively larger than the areas of the excitation light and the supplement light irradiated to the first light combining element 130, so that the light loss generated by the excitation light and the supplement light at the first light combining element 130 can be reduced until the excitation light and the supplement light are avoided, and the light efficiency is improved.

It can be understood that, in one embodiment, the excitation light and/or the complementary light incident on the surface of the first light combining element 130 is scattered light, that is, the light spots formed by the excitation light and/or the complementary light on the surfaces of the first light combining element 130, the wavelength conversion element 150 and the scattering element D are large, since the excitation light and the complementary light are respectively irradiated onto different optical elements on the substrate 154, when the optical axes of the excitation light and the complementary light incident on the surface of the first light combining element 130 are not overlapped, since the positions of the excitation light and the complementary light on the surface of the first light combining element 130 where the light intensities are concentrated are not completely overlapped, the first region and the second region are set according to the light intensity distribution of the two light beams on the surface of the first light combining element 130, so that the light spot with the relatively large light intensity of the excitation light falls into the first portion, and the light spot with the relatively large light intensity in the complementary light falls into the second portion, therefore, the proportion that the exciting light falls into the second part and the proportion that the supplementing light falls into the first part are reduced, the light loss of the exciting light and the supplementing light at the first light combining element 130 is reduced, and the light effect is improved.

In this embodiment, the wavelength conversion element 150 has a ring shape. The transition areas 152 are each in the shape of a sector of a circle. The scattering element D is annular and is disposed inside or outside the wavelength conversion element 150, but in the present embodiment, the scattering element D is disposed inside the wavelength conversion element 150 with respect to the small inner diameter of the wavelength conversion element 150. In other embodiments, the scattering element D is large relative to the inner diameter dimension of the wavelength conversion element 150, and is disposed outside the wavelength conversion element 150. It is understood that any two of the first section O1, the second section G1 and the scattering element D may be disposed at a distance or adjacent to each other.

In the present embodiment, the substrate 154 includes a filter element 156, the filter element 156 is annular and disposed at the edge of the substrate 154, the filter element 156 is disposed corresponding to the wavelength conversion element 150, and further, the filter element 156 and the wavelength conversion element 150 are stacked to intercept a portion of the received laser light and transmit a color component required in the received laser light, so as to improve the color purity of the outgoing light and expand the color gamut covered by the outgoing light. Further, in the present embodiment, the peripheral outline of the filter element 156 is the same size as the switching region 152. In one embodiment, the conversion region 152 and the scattering element D are both adhered to the surface of the filter element 156 by an adhesive, which may be optical glue, that is, the scattering element D and the wavelength conversion element 150 are disposed on the light incident side of the filter element 156, and the scattered supplementary light emitted from the scattering element D enters the filter element 156. In one embodiment, the filter element 156 is connected to the drive unit 151. The filter element may also be arranged at the periphery of the wavelength converting region.

The filter element 156 includes a first segment for filtering the orange fluorescence emitted from the first segment O1, and a second segment for filtering the green fluorescence emitted from the second segment G1.

In this embodiment, the second segment is provided with a green filter, the orange fluorescence emitted from the first segment includes the first color fluorescence and the second color fluorescence, and the first segment may be provided with a red filter corresponding to the orange fluorescence to obtain the red fluorescence incident to the light uniformizer 180, and further obtain the red primary color light emitted from the light source system 100. In one embodiment, the first segment is provided with a filter for transmitting the first color fluorescence and a part of the second color fluorescence.

As shown in fig. 2, the received laser light and the supplementary light emitted after being filtered by the filter element 156 enter the light uniformizing device 180 after passing through a necessary relay system, thereby realizing spatial light combination. It is understood that the wavelength conversion element 150 in the present invention may also be a fixed phosphor sheet, and a filter element and a scattering element may be disposed on the phosphor sheet to achieve corresponding functions.

The light source system 100 may further include a control device (not shown), when the first section O1 of the wavelength conversion element 150 is located on the optical path of the excitation light, the orange fluorescence emitted by the wavelength conversion element 150 includes the first-color fluorescence, the control device controls the second light source 120 to emit the first-color laser, and turns off the other light sources of the complementary light to ensure that the first-color laser and the first-color fluorescence are incident to the light uniformizing device 180 simultaneously, and similarly, when the second section G1 is located on the optical path of the excitation light, the wavelength conversion element 150 emits the second-color fluorescence, and the control device controls the second light source 120 to emit the second-color laser. The first color fluorescence and the first color laser in the light uniformizing device 180 are metameric lights, that is, the first color fluorescence and the first color laser belong to the same color and are red, the spectral curves of the first color laser and the first color fluorescence are different, the spectral curve bandwidth of the first color laser is narrow, the energy is concentrated, the color purity is high, the coverage color gamut range is wide, the spectral curve bandwidth of the first color fluorescence is wide, the energy is dispersed, the color purity is low, and the coverage color gamut range is narrow. The light uniformizing device 180 combines the first color fluorescence and the first color laser to facilitate expanding the color gamut covered by the first color light (red primary color light) emitted by the light source system 100, and similarly, the second color fluorescence and the second color laser are metameric light, and the light uniformizing device 180 combines the second color fluorescence and the second color laser to facilitate expanding the color gamut covered by the second color light (green primary color light) emitted by the light source system 100; the exciting light and the third color laser are metamerism light.

As shown in fig. 4, the entrance 181 of the light unifying apparatus 180 has a square shape, and the plane where the entrance 181 is located includes a first region p representing the supplementary light spot and a second region q representing the supplementary light spot.

In the respective corresponding display periods, the light spots formed by the first color laser, the second color laser, and the third color laser in the supplementary light at the inlet 181 are all located at the position of the first region p, and at this time, the supplementary light is set to have the same light path, which can simplify the light path design.

It should be noted that the fact that the first color laser and the second color laser in the complementary light have the same optical path means that a section of the optical path from the second light source to the optical element closest to the second light source is eliminated, because the first color laser and the second color laser are respectively emitted by different lasers, and generally different lasers cannot be placed at the same position. However, if the lasers with different colors can be placed at the same position or integrated into one device, the first color laser and the second color laser have the same optical path from the second light source to the light uniformizing device 180. Of course, it is more beneficial to simplify the optical path design to arrange more parts of the same optical path for the supplement light, but it is not excluded that a person skilled in the art only arranges some of the optical paths to be the same in order to avoid the patent.

At the inlet 181 of the light uniformizing device 180, the spot formed by the stimulated light and the spot formed by the first color laser are arranged side by side, and the spot formed by the stimulated light is located in the second region q.

In other embodiments, the supplemental light may not include the second color laser and/or the third color laser.

When the entrance of the light uniformizing device 180 has both the complementary laser and the excited light of metamerism, the sum of the areas of the first region p and the second region q is smaller than the area of the entrance 181 of the light uniformizing device 180, so that the light source is prevented from generating large loss after entering the light uniformizing device 180. In a preferred embodiment, the area of the first region p is smaller than the area of the second region q, which is beneficial to reducing the proportion of the emitted fluorescent light of the light source system 100 and expanding the color gamut. When only the laser spot at the entrance of the light uniformizing device 180 does not receive the laser spot, the laser spot only needs to be smaller than the area of the entrance of the light uniformizing device. The first region p and the second region q are arranged side by side and are not overlapped, or the overlapping area is smaller than a preset proportion, which is beneficial to improving the uniformity of the emergent light of the light source system 100. It can be understood that the mutual position relationship and the area size between the first region p and the second region q can be adjusted according to the optical path requirement.

It is understood that the first and second regions p and q may be provided in other shapes as needed.

The stimulated light emitted from the wavelength conversion element 150 enters the second region q, the efficiency of exciting the stimulated light by the excitation light is unchanged, the power density of the stimulated light is basically unchanged, and the conversion region 152 still has high conversion efficiency.

In a preferred embodiment, the peripheral contour of the first p and second q regions is matched to the entrance 181 in order to fully utilize the etendue of the light unifying means 180. The term "match" in this embodiment means that the peripheral contour is the same as or similar to the shape of the inlet 181, such as square, strip, or circle; and the peripheral contour has a size that is the same as or similar to the size of the inlet 181, e.g., in one embodiment, the area of the peripheral contour differs from the inlet 181 by less than 10% of the area of the inlet 181, in one embodiment, the area of the peripheral contour differs from the inlet 181 by less than 5% of the area of the inlet 181, in one embodiment, the area of the peripheral contour differs from the inlet 181 by less than 2% of the area of the inlet 181, and in one embodiment, the area of the peripheral contour is as large as the inlet 181.

Example two:

fig. 5 is a schematic structural diagram of a light source system 200 according to a second embodiment of the present invention. The light source system 200 differs from the light source system 100 mainly in that the second light source 220 in the light source system 200 does not have the third light emitter 123 compared to the second light source 120, and therefore the third color laser light does not exist in the supplement light. The light combination element is a dichroic sheet which transmits blue light and reflects other color light.

Example three:

referring to fig. 6-7, fig. 6 is a schematic structural diagram of a light source system 300 according to a third embodiment of the present invention, and fig. 7 is a schematic structural diagram of a wavelength conversion element 350 shown in fig. 6.

The main difference between the light source system 300 and the light source system 100 is that the conversion region 352 in the wavelength conversion element 350 in the light source system 300 reflects the received laser light, and the conversion region 352 includes a first section O1 and a second section G1 for generating the first color fluorescence and the second color fluorescence. The filter 356 is disposed at the periphery of the wavelength conversion element 350 and is further configured to transmit the third color laser light, the filter 356 includes a first segment and a second segment, and the peripheral contour size of the first segment and the second segment is larger than that of the conversion region 352 and the scattering element D, and the scattering element D is configured to scatter the first color laser light and the second color laser light.

In addition, the light source system 300 further includes a second light combining element 340, the excitation light emitted from the first light source 310 is irradiated to the wavelength conversion element 350 through the second light combining element 340, and the second light combining element 340 further guides the laser light emitted from the wavelength conversion element 350 to be irradiated to the first light combining element 330. The first color laser and the second color laser emitted by the second light source 320 pass through the scattering element D and then enter the second light combining element 340, and the second light combining element 340 is further configured to guide the first color laser and the second color laser emitted by the scattering element D to enter the first light combining element 330. Specifically, the excitation light is blue laser, the stimulated light includes orange fluorescence and green fluorescence, the first color laser and the second color laser are red laser and green laser, respectively, and the first light combining element 330 and the second light combining element 340 may be blue-transmitting and yellow-reflecting dichroic filters.

The first light combining element 330 is used for guiding the light emitted from the second light combining element 340 to enter the entrance 381 of the light unifying device 380 through the filter element 356, and is also used for guiding the third color laser light emitted from the second light source 320 to enter the entrance 381 of the light unifying device 380 through the filter element 356. The optical axes of the received laser light and the supplement light incident to the first light combining element 330 are not overlapped, and the first light combining element 330 can process the light rays with different colors in different regions according to the light intensity distribution of the incident received laser light and the supplement light, which is beneficial to reducing the loss of the light rays on the surface of the first light combining element 330.

The first color laser and the second color laser in the supplementary light pass through the scattering element D to form a spot at the entrance 381 of the dodging device 380, and the spot is located in the first region p; the optical axes of the received laser light and the first color laser light incident on the first light combining element 330 and the surface of the filter element 356 are not coincident, and a light spot formed by the received laser light at the entrance 381 of the light evening device 380 is located in the second region q; the optical axes of the third color laser light in the supplementary light, the first color laser light and the received laser light incident on the first light converging element 330 and the surface of the filter element 356 may be overlapped or not overlapped, that is, the spot position formed by the third color laser light in the supplementary light at the entrance 381 of the light homogenizing device 380 may be the same as or different from the first region p.

During a first period of time: the control device controls the first light source 310 to emit the excitation light to excite the conversion region 352 to generate the first color fluorescence and the second color fluorescence in a time sequence, and controls the second light source 320 to emit the complementary light of the corresponding color according to the section of the conversion region 352 on the optical path of the excitation light. The excitation light excites the conversion region 352 to generate the first color fluorescence and the second color fluorescence in a time-sharing manner, the first color laser (the second color laser) passes through the scattering element D and then enters the first light combining element 330, the filter element 356 and the inlet 381 of the light uniformizing device 380 together with the first color fluorescence (the second color fluorescence), the first color laser and the second color laser in the complementary light respectively enter the first region p, and the received laser enters the second region q.

In a second period: the control device controls the third light emitter 323 in the second light source 320 to emit the third color laser, and the first light source 310 does not emit light. The third color laser beam sequentially passes through the first light combining element 330 and the filter 356 and enters the entrance 381 of the light uniformizing device 380. In the first and second time periods, the first color fluorescence and the first color laser light, and the second color fluorescence and the second color laser light are reflected to different positions of the filter 356 by the first light combining element 330 without being overlapped with each other, and then enter the entrance 381 of the light uniformizing device 380.

In the embodiment where the second light source includes three-color lasers, the wavelength conversion element may be provided with or without a scattering section. When the scattering section is arranged, the blue primary color light emitted by the light source system is formed by combining the scattered blue excitation light and the supplemented blue laser light, and the scattered blue excitation light and the supplemented blue laser light are arranged side by side at the light spots at the entrance of the light uniformizing device so as to reduce the loss of the combined light; when the scattering section is not provided, the blue primary color light emitted by the light source system is provided by the complementary blue laser.

Example four:

in the present embodiment, the excitation light emitted from the scattering region B1 and the excited light emitted from the wavelength conversion element 150 enter the inlet 181 along the same optical path, and the excitation light emitted from the scattering region B1 also enters the second region q of the inlet 181.

Referring to fig. 8-9, fig. 8 is a schematic structural diagram of a light source system 400 according to a fourth embodiment of the present invention. The main difference between the light source system 400 and the light source system 300 is that the third light emitter is omitted from the second light source 420 of the light source system 400, the third color light emitted from the light source system 400 is provided by the first light source 410, the conversion region 452 of the wavelength conversion element 450 is used for transmitting the excited light, the wavelength conversion element 450 includes the scattering region B1 for scattering the excited light, and the scattering region B1 and the conversion region 452 are alternately located on the optical path of the excited light. The supplement light, the excited light emitted from the conversion region 452, and the excitation light emitted from the scattering region B1 pass through the scattering element D, the first light combining element 430, and the filter element 456, and then enter the inlet 481 of the light homogenizer 480. The first light combining element 430 partially transmits the excitation light and partially reflects the excited light and the scattered excitation light.

The optical paths of the excitation light, the first color laser beam, and the second color laser beam may be the same or different. The first color laser light and the first color fluorescence, and the second color laser light and the second color fluorescence are arranged side by side at the spots formed on the second light combining element 431.

The first light source 410 and the second light source 420 are respectively disposed at two sides of the wavelength conversion device 450, the excitation light emitted from the first light source 410 is irradiated to the light incident side of the conversion region 452 or the scattering region B1, and the light emergent sides of the conversion region 452 and the scattering region B1 (fig. 9) respectively emit the laser light and the scattered excitation light to a guiding device of the scattering device D, such as a reflector, a dichroic beam splitter, and the like. The supplement light, the scattered excitation light and the received laser light emitted by the second light source 420 pass through the scattering element D, the first light combining element 430 and the filter element 456 and then enter the light uniformizing device 480.

Example five:

referring to fig. 10 to 11, fig. 10 is a schematic structural diagram of a light source system 500 according to a fifth embodiment of the present invention, and fig. 11 is a schematic structural diagram of a wavelength conversion element 550 shown in fig. 10. The main difference of the light source system 500 in comparison with the light source system 100 is that the wavelength conversion element 550 reflects the received laser light. The filter element 556 is disposed at the periphery of the wavelength conversion element 550, i.e., the size of the filter element 556 is larger than the wavelength conversion element 550. The complementary light and the received laser light emitted from the conversion region 552 are incident to different positions of the first light combining element 530 and the filter element 556 as spots arranged side by side, and the light emitted from the filter element 556 enters the inlet 581 of the light uniformizing device 580.

Specifically, the spots of the first color fluorescence and the first color laser light incident on the surfaces of the first light combining element 530 and the filter element 556 are arranged side by side, and the spots of the second color fluorescence and the second color laser light incident on the surfaces of the first light combining element 530 and the filter element 556 are arranged side by side.

It should be noted that the embodiments of the present invention can be applied to other embodiments within the scope of the spirit or the basic features of the present invention, and for the sake of brevity and avoiding repetition, the details are not repeated herein.

Claims

1. A light source system, comprising:

a first light source for emitting excitation light;

a second light source for emitting laser as supplement light;

2. The light source system of claim 1, further comprising a scattering element; the scattering element is arranged on the light-emitting path of the supplement light and is used for scattering the supplement light; the wavelength conversion element and the scattering element are both in a circular ring shape, and the scattering element is spatially arranged on the inner side or the outer side of the ring of the wavelength conversion element.

3. The light source system of claim 2,

the complementary light comprises a first color laser or a first color laser and a second color laser, and the conversion region of the wavelength conversion element comprises a first section or a first section and a second section;

the first section of the conversion area is used for generating first color fluorescence as stimulated light, the second section of the conversion area is used for generating second color fluorescence as stimulated light, the first color laser and the first color fluorescence are metameric light, and the second color laser and the second color fluorescence are metameric light;

the light spots of the first color laser and the light spots of the first color fluorescence are arranged side by side at the entrance of the light uniformizing device; and the light spots of the second color laser and the second color fluorescence are arranged side by side at the entrance of the light uniformizing device.

4. The light source system of claim 3, wherein the first color laser light and the second color laser light have the same optical path.

5. The light source system according to claim 3 or 4, wherein the wavelength conversion element further comprises a scattering region, the scattering region and the conversion region are sequentially located on an outgoing light path of the excitation light, and the scattering region is configured to scatter the excitation light to form primary color light for display.

6. The light source system of claim 3, wherein the supplemental light further comprises a third color laser, the third color laser being a metameric light with the excitation light;

the light source system further comprises a light combination element, and the light combination element is arranged on the light emitting path of the exciting light and the third color laser;

the light combining element comprises a first part and a second part;

the first portion is used for reflecting the excitation light and the second portion is used for transmitting the third color laser light, or the first portion is used for transmitting the excitation light and the second portion is used for reflecting the third color laser light.

7. The light source system of claim 3, wherein the sum of the areas of the stimulated light and the supplementary light spot at the entrance of the light unifying means is less than the area of the entrance of the light unifying means.

8. The light source system of claim 7, wherein the area of the lasered spot at the integrator entrance is less than the area of the supplemental light at the integrator entrance.

9. The light source system of claim 1, further comprising a filter element corresponding to each segment of the conversion region for filtering the stimulated light emitted from the conversion region.

10. A projection device comprising a light source system as claimed in any one of claims 1 to 9.